Ratio settings
Stay with the free browser tools for another quick task, or move into Aurevessa when the work turns into a PDF workflow.
FREE BROWSER TOOL
Get the ratio before you resize
Compare dimensions, calculate aspect ratios and match new sizes without guessing.
For supported tools, processing happens locally in your browser.
Aspect Ratio Calculator
No account required. Choose your file and start with the settings below.
Ratio settings
ProcessingInstant
Useful forImages + video
PrivacyNo upload needed
×
1280 × 720px keeps a 16:9 ratio.
1280 × 720px keeps a 16:9 ratio.
Simplified aspect ratio
16:9
1920 × 1080 simplifies to 16:9.
16:9
OrientationLandscape
Decimal1.778
Matching size1280 × 720
ABOUT THIS TOOL
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Use the tool first. Read the extra detail only if you need it.
Finished this job? Your next step is one click away.
Know the shape before you export.
Ratios help you resize without guessing or stretching content.
Understanding the result
An aspect ratio describes shape, not resolution
A ratio such as 16:9 says how width relates to height. It does not tell you how many pixels are in the file. 1920×1080 and 1280×720 are both 16:9, but the first contains more pixels.
Use the calculator when you need to preserve a shape while changing dimensions. If you know one side and the desired ratio, you can calculate a matching second side instead of stretching the image.
Why simplified ratios are useful
Simplifying 1920:1080 to 16:9 makes it easier to compare dimensions from different sources. A matching simplified ratio means the shapes are equivalent even when the pixel counts differ.
If the destination requires a different ratio, decide whether to crop, add padding or accept a different composition. Changing both dimensions without considering the ratio can distort the image.